CA1040113A - Bag filter isolation damper - Google Patents
Bag filter isolation damperInfo
- Publication number
- CA1040113A CA1040113A CA240,126A CA240126A CA1040113A CA 1040113 A CA1040113 A CA 1040113A CA 240126 A CA240126 A CA 240126A CA 1040113 A CA1040113 A CA 1040113A
- Authority
- CA
- Canada
- Prior art keywords
- filter
- inlet
- outlet
- housing
- filter apparatus
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Landscapes
- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
A bag filter having inlet and outlet chambers with multiple filter elements therebetween including damper means adapted to selectively isolate individual filter elements thereof to preclude excessive leakage of atmospheric air into a filter housing when said filter elements are being removed for cleaning or repair.
A bag filter having inlet and outlet chambers with multiple filter elements therebetween including damper means adapted to selectively isolate individual filter elements thereof to preclude excessive leakage of atmospheric air into a filter housing when said filter elements are being removed for cleaning or repair.
Description
' ~
BACK~RO~IND O~ TH~ INVENTION
1. Field of khe Invention The present invention relates to a bag filter that provides for economy of manufacture by defining an arrange-ment by which independent bags thereof may be cleaned, re-moved, or repaired quickly during operating while permitting only a limited amount of leakage of relatively high pressure atmospheric air into the low pressure housing that would sig-nificantly increase the volume of air to be filtered and, 0 consequently, lower the efficiency of the filter.
BACK~RO~IND O~ TH~ INVENTION
1. Field of khe Invention The present invention relates to a bag filter that provides for economy of manufacture by defining an arrange-ment by which independent bags thereof may be cleaned, re-moved, or repaired quickly during operating while permitting only a limited amount of leakage of relatively high pressure atmospheric air into the low pressure housing that would sig-nificantly increase the volume of air to be filtered and, 0 consequently, lower the efficiency of the filter.
2. Description of Prior Art ~o avoid complete shut-down during periods of cleaning or repair, therefore, bag fllters are customarily constructed of independent modules having both inlets and outlets, side walls and end walls so they comprise a multi-plicity of completely self-sufficient units in the manner shown by U. S. Patent #3,078,646 R. R. Leech, and U. S. Patent #3,092,479 of C. W. Hedberg. In bag filters comprised of two or more modules, all modules are completely independent 0 from one another so that any module may be taken "off the line" for replacement, cleaning, or repair while all other modules continue to remain in full operation. In a ten module bag filter, for example, the bag filter would operate at 90% capacity while any one unit was deactivated to permit cleaning or repair of the bags therein. While such units are in many ways effective, they are cumbersome and expensive to manufacture because they require a great duplication of structure; i.e., side walls, inlets, outlets, and valving devices in order that each module be operatively self-suffi-0 cient '~ -1~40~113 Thus, avai.l~ble devices may function effectively, but in order that they remain continuously operative, they entall the use of duplicate structure which results in ex-cess weight and excessive manufacturing costs that may pro-hibit their general use.
SUMMARY OF THE INVENTION
The arrangement defined by this invention, there-fore, provides a lightweight, essenkially unitary, bag filter which may be constructed economically by eliminating dupli-U cate structural side walls, ducting, and various valving features while maintaining modular structure at the outlet to provide the operational advantages of a modular device.
Moreover, the device defined by this invention provides for an arrangement of a bag filter whereby it may be serviced completely from a vantage point outside the housing of the bag filter, and it provides for rapidity of repair because a multiplicity of filter bags may be simultaneously removed.
This invention provides generally for a bag filt;er-house having a series of porous filter bags hanging in an 0 undivided inlet chamber that is being supplied dust entrained fluid by a single inlet. After traversing the porous filter bags and depositing dust thereon, the clean gas passes to an outlet chamber that is divided into a multiplicity of inde-pendent sub-compartments3 each of which has an independent outlet that is individually controlled.
After fluid flow through an individual compartment has been stopped by closure of a valve in the outlet therefrom, the dampers at the end of each filter bag are moved to a closed position to prevent the influx of relatively high 0 pressure at~nosphere into the low pressure area within the ~Q~3 housing, and a filter bag may then be removed for replace-ment or repair. Some atmospheric air will immediately flow through the opening in the tube sheet, back into the housing to increase the volume of fluid to be filtered, but such flow is limited, and it is calculated to provide only a mini-mal loss of efficiency that is considered entirely acceptable in view of the inherent economic advantages.
BRIEF DESCRIPTION OF THE DR~WING
Other objectives and means of operation ~ill be-come more apparent from the specification and accompanying drawings in which:
Figure 1 is a perspective view of a bag filter~
partially cut away, showing the details of this device, Figure 2 is a transverse sectional view of a modi-fied form of device, and Figure 3 shows a perspective view of a further modi-fied form of valving arrangement.
DESCRIPTION OF THE PREFERRED EMBODIMENT
. . _ . . _ . . _ Referring particularly to Figure 1 of the drawing, the apparatus comprises a housing 10 having an inlet 12 for a dust bearing gas and a plurality of spaced outlets 14 for the exhaust of clean gas therefrom. The housing encloses a chamber that is divided into inlet and outlet portions 16-18 by a tube sheet 22 having a series of apertures 24 therein.
The apertures are covered by a venturi-shaped jet deflector 26 that extends above tube sheet 22 into the clean air chamber in accordance with standard practice, and they in-clude a porous bag filter 28 that depends therefrom and extends into the inlet chamber on the opposite side of the tube sheet.
A skeletal metallic cage 29 inside each bag filter may be ~B~4~)113 provided in accordance with standard procedure to depend f'rom the jet deflector and provide a support whereby each bag may be held continuously in its cylindrical form. Each jet de-~ flector is removably attached to the tube sheet whereby the jet deflector 26, together with the attached cage that supports the bag filter 28, may be lifted from the sheet 22 and re-moved from its surrounding aperture.
In the space above each bag filter a nozzle 36 is attached to an elongate supply tube 38 leading to an air .0 supply manifold 42 at the side of the housing that receives a ~uantity of air from a source not here illustrated. A simi-lar tube and nozzle arrangement is provided above each series of bag filters whereby compressed air may be directed there-through and into the open end of each jet deflector. A valving .5 device 44 remains normally closed but is actuated by a con-ventional timing device (not shown) to open according to a predetermined schedule to permit a blast of air to flow into the open end of the jet deflector and remove a collection of dust from the outer surface thereof.
'0 The single inlet chamber 16 has an inlet 15 thereto while the outlet chamber of the housing is divided by a series of slde walls 46 into sub-chambers L18, each of which has its own outlet 14 depending therefrom, said outlet ducts 14 being closable by a manual valve 20. Thus, the inlet chamber com-'5 prises a housing enclosing a single chamber while the outlet chamber includes a plurality of similar sub-assemblies that comprise a plurality of outlet chambers, each with a valved outlet duct that leads to a source of negative pressures, such , .
as an induced draft fan (not shown).
~0 In accordance with this invention there is also pro~ided a damper drive rod 50 that may be actuated to cover the ends O:r the bag ~ilters with damper valves 58. This damper drive rod is pivoted at 54 în opposite walls of the filter housing and terminates in a manually operable actuator 56 ~5 adjacent the outside of the housing wall. From each damper drive rod depends the dampers 58 that are adapted to cover the open ends of the bag filters whereby there can be no fluid flow therethrough when a damper is moved over the end of a bag filter. Each damper unit includes a rocker release set O screw 62 whereby manual manipulation thereof permits the damper to be loosened from the drive rod 50 and then pivoted aside so that a subjacent filter bag may be readily removed while the remaining filter bags in a given compartment re-main closed to flow therethrough.
When pivotally moved off its seat at the end of an individual bag filter, some ambient air will immediately commence to flow through the opening back into the low pres-sure area within the housing. However, cleaning or repair may be effected quickly since no encumberances will slow the O removal of the filter and only a minimum amount of atmospheric air will be lost. If it is necessary that a filter be re-moved for a period of time that would permit an extended period of air flow into thé filter housing, an imperforate plate or plug may be placed over the opening 24 to substan-tially terminate such flow so that its cleaning efficiency will not be lowered.
Upon turning of the actuator 56 to a horizontal position, each damper is designed to pivot with the damper drive rod to cover the entire outer surface of nozzle 36 and preclude fluid flow therethrough in the manner shown by Fig. 1.
~B4t~113 ~therwise~ the damper could be adapted to swing about the damper rod and actually enter the opening in the open ended deflector, as shown in Figure 2, to produce a valving action thereby. In the arrangement shown by Figure 2 a single damper ~5 may be pivoted aside to permit the removal of a single filter bag, thus, allowing less leakage than if a plurality of bags were simultaneously removed.
From a practical standpoint, however, it has been determined that less downtime is required for replacement or 0 repair if a plurality of filter bags in the assembly were arranged in lateral sub-assemblies with an "on-off" plate-type valve for each row in the manner shown by Figure 3.
~ere, an entire transverse row of filter bags is seated upon a lateral tube sheet 62 that is removably secured at 64 to the major tube sheet 22. An elongate sheet of steel, or other suitable material, is formed to provide valve means 66, that when attached to the damper drive rod 50, seats upon ; the open ends of all nozzles 36 in a given lateral row. Thus, upon actlvation of handle 56 to a vertical position, rod 50 O moves the valve means 66 off of all bag nozzles 36 whereby the lateral tube sheet 62, with its depending filter bags, may be removed as a sub-assembly. A clean or new sub-assembly may be substituted therefore, and quickly installed by tightening the screws 64 at the sides thereof to again provide an integral assembly.
A cover plate 72 is adapted to be removably attached by bolts 74 to flange 76 whereby each outlet compartment may be readily opened for ready access to the equipment therein.
In operation, when it has been determined to remove O or replace one or more filter bags in a given compartment, all the manual actuators 56 ~or that compartmen~ are movcd to a horizontal position to move the dampers over the ends of the bag filters to terminate the flow of air therethrough.
Valve 20 in the outlet duct 14 is then turned to a "closed" position to terminate the flow of induced air therethrough. Thus, the flow of all process air from inlet 12 is effectively terminated in the "closed" chamber to pro-duce a "bottled-up" effect while it continues at full flow through the remaining chambers of the filter housing.
Cover plate 72 is then removed to make accessible the contents of the entire outlet compartment.
Valve 44 in the duct for cleaning air is then closed so ducts for compressed cleaning air that lie adjacent the open ended nozzles 36 of the bags to be removed may be freely ~;5 disconnected and removed from the outlet chamber whereby they cannot impede access to the ends of the bags.
At this point, if arranged in the manner illustrated by Figure 2, a single damper valve 25 is pivoted aside by first loosening thumbscrews 62 on actuating rod 50. An entire 0 fil~er bag may then be removed and quickly replaced by a ~lew bag or one that has been properly cleaned and repaired. Rod 27, with damper 25, is then returned to a closed position, thumbscrew 62 tightened, air duct 38 and cover 72 replaced, and valves 19 and 44 opened so that full operation may be ~5 immediately resumed.
By an arrangement shown in Figure 3 it is possible to simultaneously remove a plurality of filter bags that lie under an elongate damper 66. Here~ after the damper 66 is moved aside, the apertured plate 62 is loosened by removal 0 of connections 64 and the entire sub assembly of plate 62 and 1g~`4~13 all the filter bags extending therethrough may be removed and properly replaced.
While this invention has been described with refer-ence to the illustrated species it is apparent that the present invention may be embodied in other specific forms without, de-parting from the spirit of the invention.
SUMMARY OF THE INVENTION
The arrangement defined by this invention, there-fore, provides a lightweight, essenkially unitary, bag filter which may be constructed economically by eliminating dupli-U cate structural side walls, ducting, and various valving features while maintaining modular structure at the outlet to provide the operational advantages of a modular device.
Moreover, the device defined by this invention provides for an arrangement of a bag filter whereby it may be serviced completely from a vantage point outside the housing of the bag filter, and it provides for rapidity of repair because a multiplicity of filter bags may be simultaneously removed.
This invention provides generally for a bag filt;er-house having a series of porous filter bags hanging in an 0 undivided inlet chamber that is being supplied dust entrained fluid by a single inlet. After traversing the porous filter bags and depositing dust thereon, the clean gas passes to an outlet chamber that is divided into a multiplicity of inde-pendent sub-compartments3 each of which has an independent outlet that is individually controlled.
After fluid flow through an individual compartment has been stopped by closure of a valve in the outlet therefrom, the dampers at the end of each filter bag are moved to a closed position to prevent the influx of relatively high 0 pressure at~nosphere into the low pressure area within the ~Q~3 housing, and a filter bag may then be removed for replace-ment or repair. Some atmospheric air will immediately flow through the opening in the tube sheet, back into the housing to increase the volume of fluid to be filtered, but such flow is limited, and it is calculated to provide only a mini-mal loss of efficiency that is considered entirely acceptable in view of the inherent economic advantages.
BRIEF DESCRIPTION OF THE DR~WING
Other objectives and means of operation ~ill be-come more apparent from the specification and accompanying drawings in which:
Figure 1 is a perspective view of a bag filter~
partially cut away, showing the details of this device, Figure 2 is a transverse sectional view of a modi-fied form of device, and Figure 3 shows a perspective view of a further modi-fied form of valving arrangement.
DESCRIPTION OF THE PREFERRED EMBODIMENT
. . _ . . _ . . _ Referring particularly to Figure 1 of the drawing, the apparatus comprises a housing 10 having an inlet 12 for a dust bearing gas and a plurality of spaced outlets 14 for the exhaust of clean gas therefrom. The housing encloses a chamber that is divided into inlet and outlet portions 16-18 by a tube sheet 22 having a series of apertures 24 therein.
The apertures are covered by a venturi-shaped jet deflector 26 that extends above tube sheet 22 into the clean air chamber in accordance with standard practice, and they in-clude a porous bag filter 28 that depends therefrom and extends into the inlet chamber on the opposite side of the tube sheet.
A skeletal metallic cage 29 inside each bag filter may be ~B~4~)113 provided in accordance with standard procedure to depend f'rom the jet deflector and provide a support whereby each bag may be held continuously in its cylindrical form. Each jet de-~ flector is removably attached to the tube sheet whereby the jet deflector 26, together with the attached cage that supports the bag filter 28, may be lifted from the sheet 22 and re-moved from its surrounding aperture.
In the space above each bag filter a nozzle 36 is attached to an elongate supply tube 38 leading to an air .0 supply manifold 42 at the side of the housing that receives a ~uantity of air from a source not here illustrated. A simi-lar tube and nozzle arrangement is provided above each series of bag filters whereby compressed air may be directed there-through and into the open end of each jet deflector. A valving .5 device 44 remains normally closed but is actuated by a con-ventional timing device (not shown) to open according to a predetermined schedule to permit a blast of air to flow into the open end of the jet deflector and remove a collection of dust from the outer surface thereof.
'0 The single inlet chamber 16 has an inlet 15 thereto while the outlet chamber of the housing is divided by a series of slde walls 46 into sub-chambers L18, each of which has its own outlet 14 depending therefrom, said outlet ducts 14 being closable by a manual valve 20. Thus, the inlet chamber com-'5 prises a housing enclosing a single chamber while the outlet chamber includes a plurality of similar sub-assemblies that comprise a plurality of outlet chambers, each with a valved outlet duct that leads to a source of negative pressures, such , .
as an induced draft fan (not shown).
~0 In accordance with this invention there is also pro~ided a damper drive rod 50 that may be actuated to cover the ends O:r the bag ~ilters with damper valves 58. This damper drive rod is pivoted at 54 în opposite walls of the filter housing and terminates in a manually operable actuator 56 ~5 adjacent the outside of the housing wall. From each damper drive rod depends the dampers 58 that are adapted to cover the open ends of the bag filters whereby there can be no fluid flow therethrough when a damper is moved over the end of a bag filter. Each damper unit includes a rocker release set O screw 62 whereby manual manipulation thereof permits the damper to be loosened from the drive rod 50 and then pivoted aside so that a subjacent filter bag may be readily removed while the remaining filter bags in a given compartment re-main closed to flow therethrough.
When pivotally moved off its seat at the end of an individual bag filter, some ambient air will immediately commence to flow through the opening back into the low pres-sure area within the housing. However, cleaning or repair may be effected quickly since no encumberances will slow the O removal of the filter and only a minimum amount of atmospheric air will be lost. If it is necessary that a filter be re-moved for a period of time that would permit an extended period of air flow into thé filter housing, an imperforate plate or plug may be placed over the opening 24 to substan-tially terminate such flow so that its cleaning efficiency will not be lowered.
Upon turning of the actuator 56 to a horizontal position, each damper is designed to pivot with the damper drive rod to cover the entire outer surface of nozzle 36 and preclude fluid flow therethrough in the manner shown by Fig. 1.
~B4t~113 ~therwise~ the damper could be adapted to swing about the damper rod and actually enter the opening in the open ended deflector, as shown in Figure 2, to produce a valving action thereby. In the arrangement shown by Figure 2 a single damper ~5 may be pivoted aside to permit the removal of a single filter bag, thus, allowing less leakage than if a plurality of bags were simultaneously removed.
From a practical standpoint, however, it has been determined that less downtime is required for replacement or 0 repair if a plurality of filter bags in the assembly were arranged in lateral sub-assemblies with an "on-off" plate-type valve for each row in the manner shown by Figure 3.
~ere, an entire transverse row of filter bags is seated upon a lateral tube sheet 62 that is removably secured at 64 to the major tube sheet 22. An elongate sheet of steel, or other suitable material, is formed to provide valve means 66, that when attached to the damper drive rod 50, seats upon ; the open ends of all nozzles 36 in a given lateral row. Thus, upon actlvation of handle 56 to a vertical position, rod 50 O moves the valve means 66 off of all bag nozzles 36 whereby the lateral tube sheet 62, with its depending filter bags, may be removed as a sub-assembly. A clean or new sub-assembly may be substituted therefore, and quickly installed by tightening the screws 64 at the sides thereof to again provide an integral assembly.
A cover plate 72 is adapted to be removably attached by bolts 74 to flange 76 whereby each outlet compartment may be readily opened for ready access to the equipment therein.
In operation, when it has been determined to remove O or replace one or more filter bags in a given compartment, all the manual actuators 56 ~or that compartmen~ are movcd to a horizontal position to move the dampers over the ends of the bag filters to terminate the flow of air therethrough.
Valve 20 in the outlet duct 14 is then turned to a "closed" position to terminate the flow of induced air therethrough. Thus, the flow of all process air from inlet 12 is effectively terminated in the "closed" chamber to pro-duce a "bottled-up" effect while it continues at full flow through the remaining chambers of the filter housing.
Cover plate 72 is then removed to make accessible the contents of the entire outlet compartment.
Valve 44 in the duct for cleaning air is then closed so ducts for compressed cleaning air that lie adjacent the open ended nozzles 36 of the bags to be removed may be freely ~;5 disconnected and removed from the outlet chamber whereby they cannot impede access to the ends of the bags.
At this point, if arranged in the manner illustrated by Figure 2, a single damper valve 25 is pivoted aside by first loosening thumbscrews 62 on actuating rod 50. An entire 0 fil~er bag may then be removed and quickly replaced by a ~lew bag or one that has been properly cleaned and repaired. Rod 27, with damper 25, is then returned to a closed position, thumbscrew 62 tightened, air duct 38 and cover 72 replaced, and valves 19 and 44 opened so that full operation may be ~5 immediately resumed.
By an arrangement shown in Figure 3 it is possible to simultaneously remove a plurality of filter bags that lie under an elongate damper 66. Here~ after the damper 66 is moved aside, the apertured plate 62 is loosened by removal 0 of connections 64 and the entire sub assembly of plate 62 and 1g~`4~13 all the filter bags extending therethrough may be removed and properly replaced.
While this invention has been described with refer-ence to the illustrated species it is apparent that the present invention may be embodied in other specific forms without, de-parting from the spirit of the invention.
Claims (7)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. Filter apparatus that comprises a filter housing having an inlet duct for gas to be filtered and a plurality of clean gas outlet ducts for the exhaust of clean gas therefrom, a tube sheet having perforations therein lying intermediate the inlet and outlet ports adapted to divide the filter housing into inlet and outlet chambers, filter means covering the apertures of the tube sheet, partitions in the outlet chamber intermediate outlets for the clean gas divid-ing the outlet chamber into a series of chambers each having an independent outlet port, and removable walls covering each of the sub-divided outlet chambers whereby their removal will permit access to the filter means.
2. Filter apparatus having an inlet and outlet ports as defined in claim 1 in which each outlet port is pro-vided with valving means that precludes the flow of fluid therethrough.
3. Filter apparatus having inlet and outlet ports and a perforate tube sheet therebetween with porous filter elements covering each aperture as defined in claim 1, damper means adapted to curtail the flow of fluid through each porous filter, and means outside said housing for actuating said damper means.
4. Filter apparatus having inlet and outlet ports with porous filter elements therebetween as defined in claim 3 wherein the damper means that curtails flow of fluid, in-cludes an actuating rod, extends transversely across said housing to simultaneously curtail fluid flow through multiple bag filters covered thereby.
5. Filter apparatus having inlet and outlet ports with porous filter elements therebetween as defined in claim 4 wherein said damper means comprises a series of independent valving devices.
6. Filter apparatus having inlet and outlet ports with porous filter elements therebetween as defined in claim 5 including means that effectively releases each of said valving devices from the actuating means outside said housing whereby one of said valving devices may be moved relative to the actuating rod.
7. Filter apparatus having an inlet duct and out-let ducts, as defined in claim 1, wherein the combined area of the outlet ducts is substantially equal to the cross-sectional area of the inlet.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US54214375A | 1975-01-20 | 1975-01-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1040113A true CA1040113A (en) | 1978-10-10 |
Family
ID=24162524
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA240,126A Expired CA1040113A (en) | 1975-01-20 | 1975-11-20 | Bag filter isolation damper |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JPS5197071A (en) |
| CA (1) | CA1040113A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4297113A (en) * | 1980-03-03 | 1981-10-27 | Louis Theodore | Gas filtration apparatus |
| US4377397A (en) * | 1982-02-24 | 1983-03-22 | Standard Havens, Inc. | Baghouse with on-line maintenance capability |
| US5062867A (en) * | 1989-12-14 | 1991-11-05 | Dustex Corporation | Method of retrofitting a dust collecting apparatus |
| US5271750A (en) * | 1991-07-15 | 1993-12-21 | Stripping Technologies, Inc. | Air filtration system with safety after-filter |
-
1975
- 1975-11-20 CA CA240,126A patent/CA1040113A/en not_active Expired
-
1976
- 1976-01-19 JP JP51004170A patent/JPS5197071A/ja active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4297113A (en) * | 1980-03-03 | 1981-10-27 | Louis Theodore | Gas filtration apparatus |
| US4377397A (en) * | 1982-02-24 | 1983-03-22 | Standard Havens, Inc. | Baghouse with on-line maintenance capability |
| US5062867A (en) * | 1989-12-14 | 1991-11-05 | Dustex Corporation | Method of retrofitting a dust collecting apparatus |
| US5271750A (en) * | 1991-07-15 | 1993-12-21 | Stripping Technologies, Inc. | Air filtration system with safety after-filter |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5197071A (en) | 1976-08-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4359330A (en) | Self-cleaning pulsed air cleaner with integral precleaner | |
| EP0398091B1 (en) | Air filter with horizontal filter elements | |
| US4504293A (en) | Self-cleaning air filter | |
| US4158554A (en) | Apparatus for filtering particulate-laden gases | |
| US4298360A (en) | Pulsed air filter cleaning system | |
| US4904282A (en) | Filter apparatus and method of operating same | |
| US3377783A (en) | Filter collector | |
| US3325979A (en) | Dust collector | |
| JPS58132524U (en) | Dust separation device in dust collection system | |
| US7479170B1 (en) | Modular up-draft pressure pulse bag house | |
| KR20080086633A (en) | Dust collector | |
| EP2630902B1 (en) | Vacuum cleaner with reverse air jet filter cleaning device | |
| US3816979A (en) | Method and apparatus for cleaning tube type fabric filters | |
| CA1040113A (en) | Bag filter isolation damper | |
| WO2019062545A1 (en) | Outside-filtering bag-type dust remover | |
| CA2007287C (en) | Filter system for a fluid bed granulator/dryer | |
| CA1157783A (en) | Self-cleaning pulsed air cleaner | |
| US4637825A (en) | Filter system for power sweeper | |
| US5571299A (en) | Dust collector | |
| US4230468A (en) | Dust separator with declogging device | |
| CN108993038A (en) | A kind of rotating switching type air-flow bag type dust-remover | |
| US4157901A (en) | Filter bag assembly including a venturi-cage assembly | |
| JP3655174B2 (en) | Dust collector for dust collector | |
| CN109603338A (en) | A kind of more valve associations dynamic air-flow bag type dust-remover | |
| US3864108A (en) | Dust collector with jet induced reverse air cleaning |